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AWS Cost Saver

by prajapatimehul
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AWS Cost Saver

GitHub stars License: MIT PRs Welcome Claude Code Plugin Version

Find what's wasting money in your AWS account.

You: "Scan my AWS for cost savings"
Claude: Found 8 issues. Potential savings: $340/month

Installation

The plugin ships with both a .claude-plugin/plugin.json (Claude Code) and a .codex-plugin/plugin.json (Codex) manifest, so the same source tree installs cleanly into either agent.

Claude Code

/plugin marketplace add prajapatimehul/claude-aws-cost-saver
/plugin install aws-cost-saver@aws-cost-saver-marketplace

Or interactively: /plugin → Marketplaces → Add Marketplace → prajapatimehul/claude-aws-cost-saver.

Codex

codex plugin marketplace add prajapatimehul/claude-aws-cost-saver

Then launch Codex and run /plugins to browse and install aws-cost-saver.

Other agents (MCP only)

Any agent that supports MCP can wire the AWS API server directly using plugins/aws-cost-saver/.mcp.json as a template. Skills live under plugins/aws-cost-saver/skills/ and can be loaded as plain Markdown.

Related MCP server: aws-cost-mcp

Quick Start

/aws-cost-saver:scan

Or just ask: Scan my AWS account for cost savings

Requirements: AWS credentials configured (aws configure or SSO), uv installed.

This tool only reads data — it never modifies or deletes anything. A PreToolUse hook enforces a read-only allowlist: only describe-/get-/list-/lookup-/search- style AWS CLI operations are permitted, and everything else is denied by default.

Features

  • 180 checks across EC2, RDS, S3, Lambda, ECS, EKS, Aurora, SageMaker, and 30+ services

  • Parallel scanning - 11 domain agents run simultaneously

  • Confidence scoring - filters false positives

  • Real pricing - uses AWS Cost Explorer

  • Markdown reports - clean, actionable output

What's included

Commands (slash)

Command

Description

/aws-cost-saver:scan

Full cost optimization scan across 11 domains

Skills (auto-loaded)

Skill

Description

reviewing-findings

Confidence-scored review; filters false positives

validating-aws-pricing

Mandatory Pricing-API/verified-table sanity check before reporting

Subagent

aws-cost-saver:aws-cost-saver — domain-scoped scanner. Invoke 11 in parallel (one per domain) for a full account audit.

MCP server

The plugin pre-wires the AWS API MCP server in .mcp.json, launched via uvx from scripts/start-mcp.sh. A PreToolUse hook in hooks/hooks.json (backed by scripts/guard_readonly.py) denies every non-read AWS CLI operation, keeping every scan read-only by default.

CLI

The repository also ships a standalone Python CLI (main.py) usable without a coding agent:

python main.py checks                       # list all 180 checks
python main.py check EC2-001                # detail for one check
python main.py scan-info                    # show the AWS CLI commands a scan runs
python main.py spend-hotspots --profile X   # rank scan order by real spend (Cost Explorer)
python main.py report --findings findings.json

Demo

Results

Scan results - findings and savings

Before & After

60% cost reduction - $105/day to $42/day Real AWS account: $105/day → $42/day after running the scanner

How it works

Step 1: Choose compliance requirements

Scan step 1 - Compliance selection

Step 2: Parallel agents scan your account

Scan step 2 - Parallel domain scanning

Domains & Checks

Domain

Checks

Key Areas

Compute

28

EC2 idle/over-provisioned, Compute Optimizer ML, Cost Optimization Hub, EBS, GP2→GP3

Storage

24

S3 lifecycle, CloudWatch Logs, snapshots, Secrets Manager

Database

17

RDS idle/over-provisioned, extended support, Valkey migration, RI coverage

Networking

19

Unused EIPs, NAT, public IPv4, data transfer, VPC endpoints

Serverless

11

Lambda memory, unused functions, SQS provisioned-mode idle

Reservations

13

RI/SP/Database SP coverage, purchase recommendations

Containers

17

ECS/EKS idle, extended support versions, Fargate, Spot, ECR lifecycle

Advanced DBs

18

Aurora, DocumentDB, Neptune, Redshift

Analytics

15

SageMaker, EMR, OpenSearch

Data Pipelines

12

Kinesis, MSK, Glue

Storage Advanced

6

FSx, AWS Backup

Troubleshooting

"MCP server not found" — Install uv: curl -LsSf https://astral.sh/uv/install.sh | sh

"AWS credentials not configured" — Run aws configure or aws sso login

"Access Denied" — Use ReadOnlyAccess policy or check permissions

License

MIT

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityStale
ResponsivenessSlow

Resources

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